21202001202212 has 96 divisors (see below), whose sum is σ = 38912341278720. Its totient is φ = 10096683125760.

The previous prime is 21202001202197. The next prime is 21202001202241. The reversal of 21202001202212 is 21220210020212.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1245044114 + ... + 1245061142.

It is an arithmetic number, because the mean of its divisors is an integer number (405336888320).

Almost surely, 2^{21202001202212} is an apocalyptic number.

It is an amenable number.

21202001202212 is a deficient number, since it is larger than the sum of its proper divisors (17710340076508).

21202001202212 is a wasteful number, since it uses less digits than its factorization.

21202001202212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17821 (or 17819 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 21202001202212 its reverse (21220210020212), we get a palindrome (42422211222424).

The spelling of 21202001202212 in words is "twenty-one trillion, two hundred two billion, one million, two hundred two thousand, two hundred twelve".